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Epigenetic Regulation

Epigenetic Regulation

Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...

Epigenetic Regulation

Epigenetic Regulation

Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.

Fertilization

Fertilization

During fertilization, an egg and sperm cell fuse to create a new diploid structure. In humans, the process occurs once the egg has been released from the ovary, and travels into the fallopian tubes. The process requires several key steps: 1) sperm present in the genital tract must locate the egg; 2) once there, sperm need to release enzymes to help them burrow through the protective zona pellucida of the egg; and 3) the membranes of a single sperm cell and egg must fuse, with the sperm...

Spermatogenesis

Spermatogenesis

Spermatogenesis is the process by which haploid sperm cells are produced in the male testes. It starts with stem cells located close to the outer rim of seminiferous tubules. These spermatogonial stem cells divide asymmetrically to give rise to additional stem cells (meaning that these structures “self-renew”), as well as sperm progenitors, called spermatocytes. Importantly, this method of asymmetric mitotic division maintains a population of spermatogonial stem cells in the male reproductive...

Spermatogenesis

Spermatogenesis

Spermatogenesis is a complex process that involves the development of sperm cells from undifferentiated stem cells in the seminiferous tubules of the testes. The process is essential for the production of mature and functional sperm cells that are capable of fertilizing an egg.
The process of spermatogenesis can be divided into mitosis, meiosis, and spermiogenesis. During mitosis, the spermatogonia or stem cells divide to produce two identical daughter cells, type A and B spermatogonia. Type-A...

Genomic Imprinting and Inheritance

Genomic Imprinting and Inheritance

Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...

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Updated: May 23, 2026

Stable Isotope In-Vivo Labeling for Mass-Spectrometry Identification of Paternal Metabolites Transferred from Sperm to Oocyte During Fertilization

Stable Isotope In-Vivo Labeling for Mass-Spectrometry Identification of Paternal Metabolites Transferred from Sperm to Oocyte During Fertilization

Published on: June 17, 2025

The sperm epigenome and potential implications for the developing embryo.

Timothy G Jenkins¹, Douglas T Carrell

¹Andrology and IVF Laboratories, Department of Surgery, University of Utah School of Medicine, 675 Arapeen Drive, Suite 205, Salt Lake City,Utah 801-581-3740, USA.

Reproduction (Cambridge, England)

|April 13, 2012

Summary

This summary is machine-generated.

The male sperm epigenome is crucial for embryonic development, not just male fertility. Understanding these epigenetic marks helps explain infertility and guides future research.

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Flow Cytometric Analysis of Biomarkers for Detecting Human Sperm Functional Defects

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Published on: April 21, 2022

Area of Science:

Reproductive Biology
Epigenetics
Developmental Biology

Background:

Recent advancements have significantly improved our understanding of the sperm epigenome.
The sperm epigenome's role in embryonic development and male infertility is increasingly recognized.
A normal epigenetic state in sperm has been broadly classified, offering insights into idiopathic male infertility.

Purpose of the Study:

To explore the multifaceted roles of the sperm epigenome in male fertility and embryonic development.
To investigate the potential etiologies of idiopathic male infertility linked to sperm epigenetics.
To highlight the significance of sperm epigenetic factors beyond gamete function.

Main Methods:

Review and synthesis of current literature on sperm epigenetics.
Analysis of key epigenetic factors including histone modifications, DNA methylation, and RNA transcripts.
Examination of the influence of the paternal epigenome on embryogenesis and pluripotency.

Main Results:

Sperm epigenetic factors like histone retention, DNA methylation, and RNA transcripts are vital for mature sperm.
The sperm epigenome influences embryonic development, driving gene activation and contributing to pluripotency.
Evidence suggests the paternal epigenome plays a significant role in the developing embryo, challenging previous dogma.

Conclusions:

The sperm epigenome is integral to embryonic development and influences pluripotency.
Epigenetic abnormalities in sperm may underlie male infertility.
Future research should focus on characterizing epigenetic abnormalities, and the impact of environmental factors and aging on the sperm epigenome.